Friction-brake.



No. 766,608. PATENTBD AUG. 2, 1904. G. A. ENSIGN.

FRICTION BRAKE.

APPLIUATION IILBD MAR 26, 1904.

N0 MODEL. 3 SHEETS-SHEET 1A INVENTOH N6. 766,606. PATENTED AUG. 2,'1904. G. A. ENSIGN.

FRICTION BRAKE.

APPLIOATIOH FILED Mn. 26. 1904.

60 MODEL. a snnms snnm 2.

WITNESSES. IN VENTOI? A TTOHNE Y PATENTED AUG. 2, 1904.

G. A. ENSIGN,

FRICTION BRAKE.

APPLIOATION FILED MAR. 26, 1904.

3 SHEETS-SHEET 3.

N0 MODEL.

V //v VENTOI? hue/ye 1.

WI TNESSES:

A TTOHNE No. 766,608. Patented. August 2, 1904.

UNITED STATES PATENT OFFICE.

GEORGE A. ENSIGN, OF DEFIANCE, OHIO, ASSIGNOR TO THE DEFIANCE MACHINEIVORKS, OF DEFIANOE, OHIO.

FRICTION-BRAKE.

SPECIFICATION forming part of Letters Patent No. 766,608, dated August2, 1904.

Original application filed Ianuary 15, 190 Serial No. 189,145. Dividedand this application filed March 26, 1904. Serial No. 200,112. (Nomodel.)

T 0 (0Z1 whmn if 71241 1 concern: l Wheel F in mesh With a worm Fasecured on Be it known that I, GEORGE A. ENSIGN, a the maindriving-shaft G of the machine, and citizen of the United States, and aresident of the said main shaft G is journaled in suitable 5 Defiance,in the county of Defiance and State bearings on the rear side of themain frame 5 of Ohio, have invented a new and Improved A, as plainlyindicated in Fig. 3.

Friction-Brake, of which the following is a On the main shaft G aremounted to rotate full, clear, and exact description, this being aloosely clutch-milleys G and G connected division of the application forLetters Patent by belts G and G" with overhead pulleys ar- 55 of theUnited States for a mortising-machine, ranged for driving theclutch-pulleys at a difr 1 Serial No. 189,145, filed by me January 15,ferent rate of speed, the said belt G* being i I 190%. crossed, so thatthe clutch-pulleys G and G The object of the invention is to provide aare continually driven in opposite directions.

new and improved friction-brake for use on The clutch members (notshown) of the clutch- 6O shafts and other driven parts to bring thepulleys G and G are adapted to be alternately 15 said partsautomatically andquickly to a standengaged by the clutch members H and Hof still at the desired time. a double clutch, having a hub H connectingThe invention consists of novel features and the members H and H witheach other, said parts and combinations of the same, as will be hubbeing mounted to turn with and to slide 5 more fully describedhereinafter and then on the main shaft G.

0 pointed out in the claims. The hub H of the double clutch is providedA practical embodiment of the invention is with a shifting collar H,engaged by the forkrepresented in the accompanying drawings, arm I of ashifting-lever I, having its shaft forming a part of this specification,in which I journaled in bearings on the main frame A, 7 similarcharacters of reference indicate correand when the shifting-lever 1 isswung up- 2 5 sponding parts in all the views. ward then the doubleclutch is shifted from Figure 1 is a side elevation of the improvetheleft to the right, so that the clutch memmentina released position asapplied to a morbcr H engages the clutch member of the tising-machine.Fig. 2 is a like view of the clutch-pulley G to cause the latter torotate 75 same, showing the brake in an active position. the doubleclutch, and consequently the shaft 0 Fig. 3 is a rear sectional sideelevation of the G, in one direction at a slow speed for the same. Fig.sis a plan view of the connection 1 worm F, worm-wheel F, shaft F pinionF, between the shifting-lever and the sliding rod and rack F to impart aslow downward sliding actuated by the cross-head, the said rod andmotion to the cross-head B and the mortising- 0 the bearing for the saidconnection being tools O to move the latter into the work.

35 shown in section; and Fig. 5 is a perspective \Vhen theshifting-leverF is swung downview of the forked arm of theshifting-lever ward into the position shown in Fig. 1, then for thefriction stopping device. the double clutch is shifted from the right toThe woodworkingmachine on which the the left, so as to disengage theclutch mem- 5 improved friction-brake is shown applied is ber H from theclutch member of the clutch- 4 mounted on asuitably-constructed mainframe I pulley G and to move the clutch member H A, on which is arrangedto reciprocate in a 1 in engagement with the clutch member of thevertical direction a cross-head B, carrying a clutch-pulley G to cause arotation of the cutting device O, and on the rear of the cross 5 mainshaft G in a reverse direction and at a 9 head (see Fig. 3) is secured arack F, in mesh high rate of speed to move the cross-head B 4 5 with apinion F, secured on a transverse shaft quickly upward on the returnstroke and the F journaled in suitable bearings on the mainmortising-tools C out of the work. When the frame A. On the shaft F issecured a wormdouble clutch stands in the intermediate posi- .saidhand-lever J being within convenient.

reach of the operator, so that when it is desired to start the machinethe operator swings the front end of the hand-lever downward to causethe link J to swing the shifting-le ver l upward for engaging the clutchmember H with the clutch member of the clutchpulley G to start themachine and to move the cross-head B on its downward stroke.

A downward'swinging motion is given to the shifting-lever 1 from thecross-head B at the time the latter moves in the last portion of itsdownward stroke, and for this purpose the cross-head B is provided witha collar K on a rod K, pivotally connected with. the free end of theshifting-lever I the double clutch into an inactive or intermediateposition atthe time the cross-head B has reached about one-half of itsupstroke, a camarm L is provided, secured on the front end of the shaftF and this cam-arm is adapted to engage one end of'a lever L, fulcrumedat L on the main frame A, and on the other end of the said lever L isheld a set-screw L adapted to engage a projection J 3 on the link J,connecting the shifting-lever I with the hand-lever J. N ow when theactuating mechanism moves the cross-head B upward, then the rotation ofthe shaft F causes the arm L to impart a swinging motion to the lever Lat the time the cross-head B is about onehalf the distance of its returnor up stroke, and the lever L by its set-screw L engaging the projectionJ 3 causes an upward movement of thelink J and a consequent upwardswinging motion of the shifting-lever I to move the doublefriction-clutch from the left to the right into an intermediate positionto free the double clutch of both friction-pulleys, and hence the doubleclutch and the main shaft G are left free to rotate by their acquiredmomentum.

In order to stop the shaft Gr at the time the cross-head B has reachedthe end of its upstroke, the following friction device is provided: Afriction-disk N (see Figs. 1 and 3) is adapted to move in frictionalengagement with a friction-disk N, secured to the main frame A, and thehub of the said friction-disk N is mounted to turn with and to slidelengthwise on the main shaft G. A shifting collar N is arranged on thehub N of the movable friction-disk N, and the said collar N is en Inorder to move a shifting-leverNi engaged by aset screw N, screwing inthe fork N of the arm N.

The shifting-lever N is loosely fulcrumed on the shaft N alongside thearm N and by having the set-screw N aminute adjustment can be hadbetween the shifting-lever and the arm l 6 to compensate for any wearbetween the faces of the movable friction-disk N and the fixedfriction-disk N.

The upper end of the shifting-lever N is pivotally connected by a link 0with an arm P, hung at its upper end at P on the mainframe A, andon thesaid arm P is fulcrumed a lever P pressed by a spring P at one end andsupporting at its other end a frictionroller P adapted to be engaged bya cam B secured to the arm B, attached to the cross- ,head B. The link0, connecting the shifting-lever N with the arm P, is made in twosections 0 and O pivotally connected with each other at O and the saidsections are provided at their fulcrum ends with knuckles O and Oadapted to abut one against the other when the sections O and O areclosedthat is, standing in alinement one with the other, as plainlyillustrated in Figs. 1 and 2. The sections 0 and O are adapted to beopened or swung into such position that the sections stand at angles oneto the other, as plainly indicated in dotted movable friction-disk N isat this time in frictional engagement with the fixed frictiondisk N.

When the machine is started by the operator pressing the hand-lever Jdownward, as

previously described, then the set-screw J moves in engagement with thesection 0 of the link 0 to open the link, as shown in dot- Y ted linesin Fig. 2, so that the movable friction-disk N moves out of engagementwith head B is traveling in the last portion of the.

upstroke under the force of the momentum acquired by the double clutchand the shaft Gr then the cam B moves in engagement with thefriction-roller 1 and thereby imparts a swinging motion to the arm Pfrom the left to the right, so that the link 0 is shifted in a likedirection, and consequently imparts a swinging motion to the shiftinglever N from the left to the right, thus turning the shaft N, which bythe fork N imparts movement from the left to the right to the disk N toTIO move the latter in frictional contact with the fixed disk N to bringthe shaft G to a stop at the time the cross-head B reaches the end ofits upward stroke.

It is understood that after the machine is started and the cross-head Bis moved downward then the cam B finally passes the friction-roller B(see Fig. 1) for the cam B to release the arm P, so that the sectionallink 0 is free to close by its own weight, thereby imparting a swingingmotion to the arm P from the right to the left to bring thefrictionroller P in the path of the cam B when the latter moves upwardwith the cross-head B during the upstroke of the same.

The arm P is provided with the springpressed lever P to allow swingingthis arm at the time the cross-head B moves downward and the lower endof the cam B comes in contact with the friction-roller P". thus avoidingundue shock or jar to the arm P, the sectional link, and the partsconnected therewith.

It is understood that the operator holds the lever J pressed during theentire downward stroke of the cross-head B, so that the sectional link 0remains open and the cam B passes below the friction-roller P". \Vhenthe operator releases the lever J at about the time the cross-head hasreached the end of its downstroke, then the sectional link O closes byits own weight, as previously described, and the friction-roller P thenpasses into the path of the cam B for the latter to shift the sectionallink from the left to the right to apply the brake at about the time thecross-head B reaches the end of its upstroke.

l/Vhen imparting the swinging motion to the hand-lever J, as described,the set-screw J" opens the link 0 to disengage the movable friction-diskN from the fixed friction-disk N to allow free rotation of the shaft Gr.

WVhen the cross-head moves in the last portion of its downstroke, thenthe arm B moves in engagement with the collar K and pushes the samedownward, and with it the rod K, so that a downward swinging motion isgiven to the shifting-lever l to move the double clutch from the rightto the left-that is, to disengage the clutch member H from theclutch-pulley G and to move the clutch member H in engagement with theclutch-pulley G. The motion of the shaft G is now reversed, and thecross-head B is caused to slide upward, thus lifting the tools Cgradually out of the work. \Vhen the cross-head B has reached aboutone-half of its upward stroke, then the cam-arm L moves in engagementwith the free end of the lever L, so that a swinging motion is given tothe latter, and the set-screw L is moved against the projection J tolift the link J, and thereby impart an upward swinging motion to theshiftinglever I to move the double friction-clutch into an intermediateposition; but the double clutch and shaft Gr keep on rotating by theacquired momentum to return the cross-head B to the end of its stroke.

\Vhen the cross-head B nears the end of its upstroke, then the cam Bacts on the frictionroller P", so as to swing the arm P from the left tothe right, thus causing a shifting of the friction-disk N into contactwith the fixed friction-disk N to finally bring the main shaft G to astop, and consequently the machine to a rest, at the time the cross-headB reaches the end of its upward stroke. The operator now shifts the woodrelative to the cutting-tools C, and the above-described operation isthen repeated.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination with a forward and backward drivinggear, and a shifting-lever for the same, of a hand-lever, a linkconnecting the said hand-lever with the said shifting-lever, a frictionstopping device for the said driving-gear, independent of the saidhand-lever and the said shifting-lever, and a sectional link connectedwith the said fric- 7 tion stopping device and adapted to be opened bythe action of the said hand-lever, for throwing the friction stoppingdevice out of action at the time the hand-lever is pressed by theoperator and the shifting-lever is moved from the normal inactiveposition to an active position.

2. A frictional brake comprisinga friction stopping device, a sectionallink connected with the said stopping device, a cam device and a movablepart of the machine, on which the brake is applied, the said movablepart controlling the said cam device for imparting movement to the saidsectional link, to actuate the stopping device.

3. Afriction-brake for the driving-shaft of a machine comprising ashaft, afixed friction member, a movable friction member adapted toengage the fixed friction member and mounted to slide on and to turnwith the said shaft, a shifting-lever engaging the said movable frictionmember to move the latter into or out of contact with the said fixedfriction member, a sectional link connected with the said shifting-leverand a hand-lever under the control of the operator for opening the saidsectional link to move the said movable friction member out of contactwith the said fixed friction member.

4:. A friction-brake for the driving-shaft of a machine comprising ashaft, a fixed friction member, a movable friction member adapted toengage the fixed friction member and mounted to slide on and to turnwith the said shaft, a shifting-lever engaging the said movable frictionmember to move the latter into or out of contact with the said fixedfriction member, a sectional link connected with the saidshifting-lever, a swing-arm connected with the said sectional link and amovable part on the said machine for engaging the said ITO swing-arm toimpart movement to the said sectional link and to the saidshifting-lever for the latter to move the said movable friction memberinto contact with the said fixed friction member.

5. A friction-brake for the driving-shaft of a machine comprising afixedfriction member, a movable friction member adapted to engage the fixedfriction member and mounted to slide on and to turn with the said shaft,a shiftinglever engaging the said movable friction member to move thelatter into or out of contact with the said fixed friction member, asectional link connected with the said shiftinglever, a swing-armconnected with the said sectional link and provided with a springpressedlever carrying a friction-wheel and a cam on a movable part of themachine for engaging the said friction-roller.

6. The combination with ashaft, clutch-pulleys mounted to turn looselyin opposite di rections on the said shaft, a double clutch for engagingeither of the said clutch-pulleys and mounted to slide on and to turnwith the said shaft, and a shifting-lever for the said double clutch, ofa fixed friction member, a movable friction member for engaging anddisengaging the said'fixed friction member the said movable frictionmember being mounted to slide on and to turn with the said shaft, ashifting-lever for the said movable friction member, a sectional linkconnected with the said shifting-lever for the movable friction member,and a hand-lever connected with the said shifting-lever for the doubleclutch and adapted to open the said sectional link.

7 The combination with ashaft, clutch-pulleys mounted to turn loosely inopposite directions on the said shaft, a double clutch for engagingeither of the said clutch-pulleys and mounted to slide on and to turnwith the said shaft, and a shifting-lever for the said double clutch, ofa fixed friction member, a movable friction member for engaging anddisengaging the said fixed friction member, the said movable frictionmember being mounted to slide on and to turn with the said shaft, ashifting-lever for the said movable friction member, a sectional linkconnected withthe said shifting-lever for the movable friction member, aswing-arm connected with the said sectional link, a part receivingmotion from the said shaft for acting on the said swing-arm, and ahand-lever for connection with the shifting-lever for the said doubleclutch and for opening the said sectional link.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE A. ENSIGN.

Witnesses:

GEo. W. DEATRICK, Jos. BAUER.

